Broaching-machine.



APPLICATION FILED .APR I6A 1915.

Y Tf @#08662 F. J. LAPOI'NTE.

RoAcHING MACHINE.

F l3w- 61111119:

ranczls llapo'gilg, by

Pund Dea. 14,1915.

E J. LAPOINTE BROACHNG MACHINE.

APaLlcATloN FILED APR.16,19\3,

Patented Dec. 14, 1915.

4 SHETSfY-SHUI 1l.

Francis J. Lapoite,

l blym A FRANCIS J. LAPOINTE, 0F NEN LONDON, CGNNECTICUT.

BROACHIIG-MACHINE.

Specication of Letters Patent.

Patented Bee. 14, 1915.

. Application filed April 1S, 1915. Serial No. 21,881.

.'o all whom it may concern.' Be itfknown that I, FRANCIS J. LArorN'rE,

a citizen of the United States of America, and a resident of New London, in the county of New London and State of Connecticut, have invented certainvnew and useful Improvements in BroachingMachines, of which the following is a specification. A

This invention relates to breaching machines, and has for one of its objects theproduction of a. machine of this character` in which both ends of the cutting tool will be supported while in operation upon the work and which will be simple in construction and effective in operation.

Another object of the invention is to locate the stopping devices of the machine so that they will occupy less space than those heretofore used and where they will not be in the way of theoperator.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description ofthe drawings and to the claims hereinafter given.

.Of the drawings: Figure 1 represents a plan of a machine embodying the principles of the present invention. Fig. 2 represents a longitudinal elevation of the same. Fig. 3` represents a longitudinal elevation 'bf the cxtension'to the main frame carryihg the movable support for the outer end of the working tool. Fig. 4 represents a longitudinal vertical section of the same drawn to an enlarged scale. lF ig. 5 represents a trans verse section of the same, on line-5 5 on Fig. 4t, looking to the left thereof. Fig. represents a. transverse section of t. e same, on line tron Fig. 4, looking to the right thereof. Fig. 7 represents a longitudinal verticalv section of the driving mechanism, drawn to an enlarged scale. Fig. 8 represents a longitudinal vertical section of the work' supporting end of theJ machine drawn to an enlarged scale. Fig. 9 represents a transverse vertical section of the same. on

line 9 9 on' Fig. 7. Fig. 10 represents apartial plan of the driving mechanism, showingrthe gear shifting device. Fig. 11 repre;

sents a transverse vertical section drawn te an enlarged scale. on line 11-11 on Fig. 8. Fig. 12 represents a longitudinal vertical scc tion drawn to an enlarged scale of aportioo of the device Jfor stopping the operation of the machine at a predetermined time, and Fig. 13 `represents a transverse vertical section of the same, on line 13-13 on Fig. 12.

Similar characters designate like parts throighout the several figures of the'drawings.

Inithe drawings, 10 represents a base pro.- vided with a bed frame 11, this bed frame being supported at its outer end by means of a standard 12. The bed frame 11 is open at the top as indicated in the several views of the drawings. The inner faccof the side walls of the Abed frame 11 is provided with guideways 12x extending lengthwise thereof. The frame 10 is provided with suitable bearings 13 and 14 in which is mounted a revoluble shaft 15 having loosely mounted thereon the pulleys 16 and 17 of different diameters. The pulleys 16 and 17 are provided respectively with Vthe cone-shaped hubs 18-19 positioned within the depressions in the ends of the clutch member 20 keyed to and revoluble with the shaft 15. The clutch member20 is pr vided with an annular g-roove 2 1 therein with which gages a pin 22 on a lever 23 pivoted at 2 :to the frame 10.. When-'the lever 23 is moved about its pivot 2-1 the clutch 20 may be engaged with either of the conical hubs 18 or 19 of the pulle'ys16v and 17, thereby permitting rotary movement to 'be transmitted to the shaft 15 from either the pulley 16 or the pulley 17. Belts (not shown) on the pulleys 16 and 17 are adapted to drive these pulleys in opposite directions. The-shaft 15 has also secured thereto a pin ion 2) meshing with a gear 26 secured to an intermediate shaft 27 above and parallel to the revoluble shaft 15. Through the gears 25 and 26 rotary movement in either direcL tion-is imparted to the shaftV 27. The shaft 27 has also secured thereto apinion 28 and a smaller pinion 29. The latter pinion is adapted to engage a ear 30 splincd to and slidable longitudinall f of a rcvoluhle sleeve 31 having keyed thereto a nut 32 in which is threaded a nonrevol ihle screw 33. The gear 30 has also secure tllereto or formed integral therewith a smaller gear 34 adapted to mesh with the pinion 28 on the vshaft 27 when the gears 30 and Shave been moved longitudinally of the sleeve 31. The pinions 28 and 29 are so spaced apart that only one of these at a time will be in mesh with its ce.

- acting gear 34 or 30, and in the movement 1f the gears 30-34 endwise of the sleeve 31 one gear will be removed from mesh with its pinion before the other gear meshes with the pinion with which it coacts. The rotation'of the gears 30, 34 will rotate the nlut 32 and cause the endwise movement of the screw 33, said nut 32 having no endwise movementl The gears 30 and 34 are adapted to be moved along the sleeve 31 by means of the shifting rod 35 movable endwise in the bearings 36 and 37 in the frame 10. The shifting member 35 is provided with a handle 38 by which it may be operated and has secured thereto between the bearings 36 and 37 the bifurcated member 39 straddling the gear 30. The rod 35 is provided with a diametral pin 40 extending into a groove 41 in the bearing 36, thereby preventing said rod 'from rotating about its axis. The Sleeve 31 is provided With a flange 42 to which is secured the flange`43 of a tubular member V44 extendmg through a bearing in the frame 10 and in the end transom 45 of the bed frame 11, said tubular member 44 being secured in position by means of the adjusting nuts 46.

Interposed between the flange 43 and the inner wall of the frame 10 is an antifriction device 47 of any well-known construction, which is adapted to take up any end thrust of the screw 33 when the working tool is in operation.

The opposite end of the sleeve 31 is mounted in ,the bearing 48 in the frame 10, and the nut 32 is positioned therein by means of the annular member 49 threaded to the inner wall of said sleeve 31, all as shown in Fig. 7 of the drawings.

Secured to the frame 10 is a supporting member 50 from which extends the tubular member 51 in alinement with the axis of the nonrevoluble screw 33. The end of' the screw 33 is provided with a lateral finger 52 extending' through a slot 53 in the wall of the tubular member 51. The opposite end of the nonrevoluhle screw 33 has keyed thereto the carriage 54 having adjustably mounted in its outer end the tool holder adapted to be vertically adjusted in the guideway 56 by means of the adjusting member 57. The end plate 58 of the bed frame 11 is provided with an annular opening in which is positioned the flanged bushing 59 against the outer face of which rests the work 60 to be operated upon.

Secured to the outer face oi lthe end plate 58 is an extension 6l. This extension 61 is provided with an upwardly extending central rib 62 having outwardly extending flanges 63 on which is adapted to be reciprocated the tool Supporting member 64 having clamped therein a bushing (35 having a tapered bore 66 as indicated in Fig. 4 of' the drawings. One of the flanges 63 has formed on its under face or secured thereto a rack 67 with which a pinion 68 is adapted to mesh. This pinion 68 is secured to a revovluble shaft 69 mounted in a bracket 70 secured to the tool supporting member 64. The outer end of' the shaft 69 has secured thereto an operating handle 71 by which the pinion 68 may be rotated to cause the tool supporting member 64 to' be reciprocated longitudinally of the flanged support (S2-63. The outer end of the extension 61 is provided vvith a support 72, the lower end ot which extends into the base 73 and is threaded as at 74. A nut 75 on the threaded portion 74 of the support 72 and resting upon the base 73 may be moved about the axis of the supporting member 72 to level the extension 61.

The axis of the conical bore 66 may be brought into alinement with the tool holder 55 by adjusting the latter by means of the member 57. The smaller end of the working tool 76 extends through the annular bushing 59 and is Secured to the tool holder 55 by means of the pin .77, thereby causing the working tool to be moved longitudinally of theA bed frame 11 and through the work 60 as the carriage 54 reciprocates on the guideways 12. The work 60 is previously provided with an opening therethrough to re; ceive the smaller end of the working tool 76.

hen long broaching tools 76 Aare being used, it is quite essential that the other end of the tool should be supported in exact alinement with the tool holder 55. To this end the larger end of the working tool 76 is made cone-shaped as shown at 78 to fit the conical bore 66 of the tool supporting member 64. When a piece of the work is about to be broached, the smaller end of the Working tool 76 ,having been inserted through the rough opening in the work 6() is secured in the tool support 55 of the carriage 54 as indicated in Fig. 8 of the drawings. The operator then, by means of the handle 71, moves the tool supporting member 64 toward the end 58 of the bed frame l1 thereby jamming the bushing 65 onto the conical end 78 of the working tool 76 so firmly that when the working tool is moved With/ the carriage 54 in the direction of the arrow a on Fig. 4 of the drawings, the tool supporting member 64 will be moved therewith until the face 79 comes into contact with the outer face of the work 60, whereupon the further movement of the tool supporting member 64 will be prevented and the continued movement of the carriage 54 with the working tool 7G will withdraw the conical end 78 from the tool supporting member 64, thus permitting the larger end of the broaching tool to pass through the work. rI'his means of supporting the outer end of the working tool during its operation is or great advantage, as the tool is prevented from chattering and injuring the work being operated upon or doing imperfeet work. The guideways 12X in the bed frame 11 are made removable aS indicated in Fig. 11 of the drawings, being secured by bolts to ribs 81 extending inwardly from the inner walls of the bed frame 11. These guideways 12X extend into grooved members preferably of bronze fitted into the sides of the carriage 51 and secured in position by the screws 83. This feature is of considerable importance as by the use of the removable` guide bars 1QX and the shoes the life of the bed frame and the carriage .is greatly prolonged, for when the guideways become worn, the bars 1QX and the shoes 82 may be replaced with new bars and shoes, making the entire machine as good as new. The support 12 has secured thereto a pan 84 adapted to catch the oil and chips passing through the opening 85 in the bed frame 11.

. Any oil Collected in the extension 01 is adapted to pass through the opening 86 into this pan Si and all the oil in the pan is a]- lowed to drip through the small perforations S? therein into the receptacle 88 from which it is adapted to flow through a pipe 80 into the tank 00 formed in the bottom of the traine 10, The tubular member 51 has brackets 91 secured thereto in which is mounted a rod 92 havingy two sets of ratchet teeth 03mm formed in the upper face thereof, each set of teeth having the backs thereof oppositely inclined to the backs of the other set. Intermediate the two sets of teeth 93 and 04. the rod 92 has secured thereto a colla 95 to which is pivotally secured a bar 96 extendingr through a bearing 07 on the trame 10 and having its opposite end pivotally Connected at to an operating lever 0.) serured to a shaft. 100 adapted to oscillate in bearings in the bed frame 11 and having secured to its opposite end on the other side of Said bed traine a lar handle 101. The operatingy faees oi ne teeth ltvfli laee the collar 05 intermediate the two sets of teeth. To the bar 0C is. pi voted at 102 the upper end o? thtJ ciutrlf whitting member 23. lt iS ohviofis. therefore. that liv means ot' either the handle 00 or 101 the operator can move the bar in its nearing 9T and through, the meniuni ot the rlutrh shitting member 23 cause the engagement ot the clutch 20 with eimer the pullcv 1G or l? to set the drivingl nnrhanism in operation either in one diret tion or the other. Thi;I driving mechanism rausing,r the rotation of the sleeve 31 with its nut 3:2 splined thereto wili elle-vt the retiproA ration vl' the nonrevolnble screw S3 with its carriage fil secured thereto. AS the .screw lil move1 crwlwise through the nul 3Q the Ynfv-r Tia will trawl lengthwise of the slot L in the tub/blur member 31. (ln rither side of the oolar 05 is a stop member 105. this Cop member having` a proieetion 10i it. the path ot movement of the finger 52. The

stop member 103 is provided with a spring pressed pavvl 105 engaging either of the sete of teeth 023 or 9i on the rod 0;). The tension of the springV nav be regulated by adjusting the nut threaded to the shank of the pawl 105. The teeth4 03 and Jl on either .side of the collar 0i) are so constructed that the stop members 1022 wav le readily moved toward the Collar to eng, To with selected teeth, btt when once adjusted are prevented from moving awzyv from said collar by the engagement of the pawl 105 with the vertical faces of the teeth 03 and 91. lt is obvious, therefore, thatl the linger 52 moves along the slot in either direction it will engage with the projection 101 ot' one of the stop niembers 103 and cause the rod 92 to be moved in its bearings,` thus etlecting a movement of the bar 06 and the shifting of the eluteh 20 to an intermediate position and'stop further operation of the machine.

Either stop member 103 may be moved about the axis of the rod 92 into a position perpendicular to their normal positions as Shown in the dra wings, Said movement Causing the paw] 105 to be disengaged from the teeth 03 or 011-. YWhen the stop members' 103 have been disengaged from the teeth ST5-4&4 in this n'iai'mcr, it is obvious that said stop members may be moved along the rot'L 02 away from the collar 95 to asstin'ie {in}v desired position.

Before Astartlingr to operate upon in vv pietre of work the stop member 10S at the left of Fig. 2. of the drawings is adjusted in position along the bar 92 so that at the time of Completion oi' the movement ol1 the worlv'iinr tool 70 through the worlv'` the linger ft2 will have nxovcd the stop member snticientlv to have stopped the machine. The stop member 1023 at the right of the collar 05 as shown in Fig. i otl the drawin" y will lie .similarlyy positioned on the rod 51;. .-o that at" the rotti-- bletion of the rriurn mmc-ment ot the earrianc ol to itsA n. xmal poi. tain the rod itz will ne moved sullifieutv to the right if Filer. 2 of the draninfls to iiain stop t machine yirepaa'atori* to another optra i of the working,r tool.

Ilxeept licreinbetorc dtvribed. the operation of' the machine is ti', v.iwt-iallv the anu as described in lzitcnt No. i. y issued to nie April QT. 101i. and to which reference may be made l`or the general opor. ation ot hroachinglr morbillo# nl this intrac ter.

lt is believed that the operation and man v adv:\ntae r ot' this invention will be fulr understood 'from the 'foregoing drsrriplinn.

Having thus. described mi inwnioii. i elaine l. Vln :i rnrhine o!" thv a defrrilfeil. the t .".ination of' a lad traine: a tool holder a.. i i fi to rwit'iioeito lrnffthnir-r tlwreof ai halting n parl ol" a nonrmonhir screw; a nut on said screw; two gears of different diameters on said nut revoluble therewith and slidable lengthwise thereof; a revoluble shaft parallel to said screw; two gears of different sizes keyed to said revoluble shaft and one of which is adapted to mesh with one of the gears on said nut when the latter are moved on said nut in either direction; and means for driving said parallel shaft.

2. In a machine of the class described, the combination of a bed frame; a tool holder adapted to recipi'ocate lengthwise thereof and consisting in part of a nonrevoluble screw; a nut on said screw: a sleeve keyed to said nut; two gears of different sizes mounted to revolve with said sleeve and move lengthwise thereof; a revoluble shaft.

parallel with said sleeve: and two separated gears thereon one of which is adapted to mesh with a gear on said sleeve when the gears on said sleeve are moved thereon to the eXtreme of their movement in either direction.

3. In a machine of the class described. the combination of a bed frame: a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a nut on said screw; two gears of different sizes revoluble with said nut and movable lengthwise thereof; a, revoluble shaft parallel to said nut; two separated gears revoluble therewith but fixed from end movement, one of said gears being adapted to mesh with one of said nut gears when the latter are moved to the extreme of their movement in either direction; a driven gear on said shaft; a driving shaft provided with a driving gear in mesh with said driven gear; means for shifting said nut gears; pulleys on said driving shaft adapted to be drivene in opposite directions; and means slidaily mounted on said shaft adapted to be engaged alternately with each of said pulleys; thereby driving said shaft alternately in opposite directions.

4. In a machine of the class described, the combination of a bed frame; a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a nut on said screw; two gears of different sizes revoluble with said nut and movable lengthwise thereof; a revoluble sli'aft parallel to said nut; two separated gears revoluble therewith but fixed from end movement, one of said gears being Vadapted to mesh with one of said nut gears when the latter are moved to the extreme of their movement in either direction; a driven gear on said shaft; a driving shaft provided with a driving gear in mesh with said driven gear; means for shifting said nut gears; oppositely driven pulleys of diifer'ent diameters loosely mounted on said shaft; and means keyed to said driving shaft a11`d adapted to be driven by either pulley for revolving said shaft alternately in opposite directions at different speeds.

5. In a machine of the class described, the combination of a bed frame; a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a projecting finger on said screw; a clutch for controlling the reciprocation of said tool holder; a clutch shifting mechanism including in part a slidable member parallel to said screw and provided with a plurality of teeth; and a stop member engaging said teeth on said slidable member on each side of said finger.

G. In a machine of the class described. the combination of a bed frame; a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a projecting finger on said screw; a clutch for controlling the reciprocation of said tool holder; a clutch shifting mechanism including in part a slidable member parallel to said screw and provided with two sets of ratchet teeth.r each set having its teeth oppositely inclined to those in the other set; and a stop member movable lengthwise of each set of teeth and having a pawl engaging said teeth.

7. In a machine. of the class described, the combination of a bed frame; a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a projecting finger on said screw; a clutch for controlling the reciprocation of said tool holder; a clutch shifting mechanism including in part a slidable member parallel to said screw and provided with two sets of ratchet teeth, each set having its teeth oppositely inclined to those in the other set; and a stop member movable lengthwise of each set of teeth and having a spring pressed pawl engaging said teeth.

8. In a machine of the class described, the combination of a bed frame; a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a projecting finger on said screw; a clutch for controlling the reciprocation of said tool holder; a clutch shifting mechanism including in part a cylindrical slidable member parallel to said screw and provided with two sets of ratchetteetln each set having its teeth oppositely inclined to those in the other set; a collar movable endwise of said cylindrical member opposite each set of teeth and provided with a projection in the path of said finger; and means thereon engaging said teeth preventing movement of said collars toward the ends of said cylindrical member.

9. In a machine of the class described,the combination of a bed frame; a tool'holder adapted to reciprocate lengthwise thereof and consisting 1n part of a nonrevolubh Vholder adapted to re Screw; a projecting finger on said screw; a clutch for controlling the reciprocation of said tool holder; a clutch shifting mechanism including `in part a cylindrical slidable member parallel to said screw and provided with two sets of ratchet teeth the backs of which are inclined inwardly and in opposite directions from a point intermediate said sets; a collar movable endwise of the toothed portion of said cylindrical member and provided with a projection in the path of said finger; means thereon engaging said teeth normally preventing movement of said collars toward the ends ot' Said cylindrical member but adapted to be disconnected from said teeth to permit said collar to be moved about its axis thereby removing the projection thereon from the path of said fingers,

10. In a' machine of the; class described, the combination of a bed frame; a tool holder adapted to reciprocate lengthwise thereof and consisting in part of a nonrevoluble screw; a projecting finger thereon; a clutch for controlling the reciprocation of said tool holder; a clutch shifting' lever; a slidable bar pivotally connected to the outer end of said lever; a rod reciprocable in bearings to which said bar is connected at a point intermediate its` ends and provided with two sets of ratchet teeth on opposite sides of said connection, each set having its teeth oppositely inclined to those in the other set; and a stop member on each end of Said rod freely Vmovaie toward said connection but prevented from moving outwardly there- A from. 4

11. In a machine of the clasydescribed; the combination of e bed frame; a. tool holder adapted to reciprocate lengthwise thereof and. consisting in part ot a nonrevolubie screw; a tubular inclosure for said screw having a slot extending lengthwise thereof; a finger secured to said screw end extending through seid. slot; a clutch forT controlling thelgi'eciprocntion of said tool' holder; and a cliitch shitting mechanism including stop members or. opposite sides ot said finger and in the path of movement thereof.YAY

12. In a machine the class described( the` combination of a bed frame; a tool ,recate lengthwise thereof and consisting part ot a nonrevo-Y luble Soren; a. tnbuler inelosure for said screw, having a slotV extending iengthwse thereof; a finger secured to said screw extending through i sint; a clutch for controlling the roeier-ocation ot said tooi holder; two bearin secured to opposite ends said inclosuic; fr rod movable end Wise therein; stel ie-embers tl reen in the path of Said nger eri n clutch vice connected to sein #ed at a point intern mediate said stop members.

13. In a machine of the class described,

the. combination of a. bed frame; a tool holder adapted to be reciprocated lengthwise thereof; a support adjacent to the work supporting end of said bed frame and provided` with guideways parallel with the path of said tool holder; and a reciprocable member on said support provided with means for frictionally engaging the outer end of the working tool, and means for moving Said reciprocable. member into frictional engagement with the outer end of the working tool, whereby said member is adapted to be freely moved toward Suid bed frame by and in unison with said tool and disengaged from said tool by contact with the work being operated upon.

14. In a machine of the class described,

the combination of a. bed frame; a tool` holder adapted to be reciprocated lengthwise thereof; an extension frame secured to the work supporting end of said bed frame provided with an immovable rack; a carriage movable lengthwise of said extension frame independently o'f said tool holder and adapt ed to be moved in unison therewith when supporting tl1e.onter end of the Working tof-l; a pinion carried by said carriage and meshing with said rack; and means for rotating said pinion.

15. In a machine of the class described, the combination of a bed frame; a tool holder adapted to be reciprocated lengthwise thereof; an extension frame secured to the work supporting end of said bed trarne provide v with an immovable rack; a carriage mov1 le lengthwisejof said extension frame having a split bearing; albushing for said bearing adapted to support the outer end of the operating tool; means for clamping said bearing on said bushing; a pinion carried by said carriage and meshing with said rack; and means for rotating said pinion` lf3. In a machine ot the class described; the" combination of bed frame; a tool holder adapted to be reeiprocated lengthwise thereof: :in extension trame secured to the work supporting end of said bed frame provided titl en immovable rack; a carriage moval'iie lengthwise ot said extension frame independently of snid tool holder and havn ing e split hearing; u bushing for said bearing having a tapered bore adapted to support the outer und et the operating tool; encens for clamping said bearing on said bushing; a pinion carried by said carriage end meshing with said rack; and means for rotating Suid pinion. v

17. ln n machine of the olaf-:s de 3ribed; the eomhimrtion oi" a bed frame; a tool holder adapted to be reciprocated lengthwise thereof; 'un extension frame secured tothe work .supporting end of said bed frame and novifled with a T-.shapr-d central rib having a: nurx on the under face of one of the Hongos thereof; a carriage movable length- 'nsl wise of said rib independently of said tool' holder but adapted tomove in unison therewith when supporting the outer end of the operating tool; a pinion carried by said carringe und meshing with Said rack; means for rotating said pinion; and a bushing secured in saidcarriage having a tapered bore adapted to receive and support the outer end of the working tool.

1S. In a, machine of the class described, the combination' of a bed frame; a tool holder adapted to be reeiprocated lengthwise thereof; an extension frame secured to the work supporting end of said bed frame provided with an immovable rack; a carriage movable lengthwise of said extension frame independently of said tool holder and adaptl ed to be moved in unison therewith when supporting the outer end of the working tool, said carriage being provided with a socket to receive the outer end 0f the Working tool and frictionally engage therewith; a pinion carried by said carriage and meshing with said rack; and means for rotating said pinion.-

Signed by me at New London, Connecticut, this 12th day of April, 1915.

FRANCIS J. LAPOINTE.

Witnesses:

MALCOLM M. SCOTE, MARTIN J. CULLIN. 

